Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial
[linux-3.10.git] / drivers / net / tokenring / ibmtr.c
1 /* ibmtr.c:  A shared-memory IBM Token Ring 16/4 driver for linux
2  *
3  *      Written 1993 by Mark Swanson and Peter De Schrijver.
4  *      This software may be used and distributed according to the terms
5  *      of the GNU General Public License, incorporated herein by reference.
6  *
7  *      This device driver should work with Any IBM Token Ring Card that does
8  *      not use DMA.
9  *
10  *      I used Donald Becker's (becker@scyld.com) device driver work
11  *      as a base for most of my initial work.
12  *
13  *      Changes by Peter De Schrijver
14  *              (Peter.Deschrijver@linux.cc.kuleuven.ac.be) :
15  *
16  *      + changed name to ibmtr.c in anticipation of other tr boards.
17  *      + changed reset code and adapter open code.
18  *      + added SAP open code.
19  *      + a first attempt to write interrupt, transmit and receive routines.
20  *
21  *      Changes by David W. Morris (dwm@shell.portal.com) :
22  *      941003 dwm: - Restructure tok_probe for multiple adapters, devices.
23  *      + Add comments, misc reorg for clarity.
24  *      + Flatten interrupt handler levels.
25  *
26  *      Changes by Farzad Farid (farzy@zen.via.ecp.fr)
27  *      and Pascal Andre (andre@chimay.via.ecp.fr) (March 9 1995) :
28  *      + multi ring support clean up.
29  *      + RFC1042 compliance enhanced.
30  *
31  *      Changes by Pascal Andre (andre@chimay.via.ecp.fr) (September 7 1995) :
32  *      + bug correction in tr_tx
33  *      + removed redundant information display
34  *      + some code reworking
35  *
36  *      Changes by Michel Lespinasse (walken@via.ecp.fr),
37  *      Yann Doussot (doussot@via.ecp.fr) and Pascal Andre (andre@via.ecp.fr)
38  *      (February 18, 1996) :
39  *      + modified shared memory and mmio access port the driver to
40  *        alpha platform (structure access -> readb/writeb)
41  *
42  *      Changes by Steve Kipisz (bungy@ibm.net or kipisz@vnet.ibm.com)
43  *      (January 18 1996):
44  *      + swapped WWOR and WWCR in ibmtr.h
45  *      + moved some init code from tok_probe into trdev_init.  The
46  *        PCMCIA code can call trdev_init to complete initializing
47  *        the driver.
48  *      + added -DPCMCIA to support PCMCIA
49  *      + detecting PCMCIA Card Removal in interrupt handler.  If
50  *        ISRP is FF, then a PCMCIA card has been removed
51  *        10/2000 Burt needed a new method to avoid crashing the OS
52  *
53  *      Changes by Paul Norton (pnorton@cts.com) :
54  *      + restructured the READ.LOG logic to prevent the transmit SRB
55  *        from being rudely overwritten before the transmit cycle is
56  *        complete. (August 15 1996)
57  *      + completed multiple adapter support. (November 20 1996)
58  *      + implemented csum_partial_copy in tr_rx and increased receive 
59  *        buffer size and count. Minor fixes. (March 15, 1997)
60  *
61  *      Changes by Christopher Turcksin <wabbit@rtfc.demon.co.uk>
62  *      + Now compiles ok as a module again.
63  *
64  *      Changes by Paul Norton (pnorton@ieee.org) :
65  *      + moved the header manipulation code in tr_tx and tr_rx to
66  *        net/802/tr.c. (July 12 1997)
67  *      + add retry and timeout on open if cable disconnected. (May 5 1998)
68  *      + lifted 2000 byte mtu limit. now depends on shared-RAM size.
69  *        May 25 1998)
70  *      + can't allocate 2k recv buff at 8k shared-RAM. (20 October 1998)
71  *
72  *      Changes by Joel Sloan (jjs@c-me.com) :
73  *      + disable verbose debug messages by default - to enable verbose
74  *        debugging, edit the IBMTR_DEBUG_MESSAGES define below 
75  *      
76  *      Changes by Mike Phillips <phillim@amtrak.com> :
77  *      + Added extra #ifdef's to work with new PCMCIA Token Ring Code.
78  *        The PCMCIA code now just sets up the card so it can be recognized
79  *        by ibmtr_probe. Also checks allocated memory vs. on-board memory
80  *        for correct figure to use.
81  *
82  *      Changes by Tim Hockin (thockin@isunix.it.ilstu.edu) :
83  *      + added spinlocks for SMP sanity (10 March 1999)
84  *
85  *      Changes by Jochen Friedrich to enable RFC1469 Option 2 multicasting
86  *      i.e. using functional address C0 00 00 04 00 00 to transmit and 
87  *      receive multicast packets.
88  *
89  *      Changes by Mike Sullivan (based on original sram patch by Dave Grothe
90  *      to support windowing into on adapter shared ram.
91  *      i.e. Use LANAID to setup a PnP configuration with 16K RAM. Paging
92  *      will shift this 16K window over the entire available shared RAM.
93  *
94  *      Changes by Peter De Schrijver (p2@mind.be) :
95  *      + fixed a problem with PCMCIA card removal
96  *
97  *      Change by Mike Sullivan et al.:
98  *      + added turbo card support. No need to use lanaid to configure
99  *      the adapter into isa compatibility mode.
100  *
101  *      Changes by Burt Silverman to allow the computer to behave nicely when
102  *      a cable is pulled or not in place, or a PCMCIA card is removed hot.
103  */
104
105 /* change the define of IBMTR_DEBUG_MESSAGES to a nonzero value 
106 in the event that chatty debug messages are desired - jjs 12/30/98 */
107
108 #define IBMTR_DEBUG_MESSAGES 0
109
110 #include <linux/module.h>
111 #include <linux/sched.h>
112
113 #ifdef PCMCIA           /* required for ibmtr_cs.c to build */
114 #undef MODULE           /* yes, really */
115 #undef ENABLE_PAGING
116 #else
117 #define ENABLE_PAGING 1         
118 #endif
119
120 /* changes the output format of driver initialization */
121 #define TR_VERBOSE      0
122
123 /* some 95 OS send many non UI frame; this allow removing the warning */
124 #define TR_FILTERNONUI  1
125
126 #include <linux/ioport.h>
127 #include <linux/netdevice.h>
128 #include <linux/ip.h>
129 #include <linux/trdevice.h>
130 #include <linux/ibmtr.h>
131
132 #include <net/checksum.h>
133
134 #include <asm/io.h>
135
136 #define DPRINTK(format, args...) printk("%s: " format, dev->name , ## args)
137 #define DPRINTD(format, args...) DummyCall("%s: " format, dev->name , ## args)
138
139 /* version and credits */
140 #ifndef PCMCIA
141 static char version[] __devinitdata =
142     "\nibmtr.c: v1.3.57   8/ 7/94 Peter De Schrijver and Mark Swanson\n"
143     "         v2.1.125 10/20/98 Paul Norton    <pnorton@ieee.org>\n"
144     "         v2.2.0   12/30/98 Joel Sloan     <jjs@c-me.com>\n"
145     "         v2.2.1   02/08/00 Mike Sullivan  <sullivam@us.ibm.com>\n" 
146     "         v2.2.2   07/27/00 Burt Silverman <burts@us.ibm.com>\n" 
147     "         v2.4.0   03/01/01 Mike Sullivan <sullivan@us.ibm.com>\n";
148 #endif
149
150 /* this allows displaying full adapter information */
151
152 static char *channel_def[] __devinitdata = { "ISA", "MCA", "ISA P&P" };
153
154 static char pcchannelid[] __devinitdata = {
155         0x05, 0x00, 0x04, 0x09,
156         0x04, 0x03, 0x04, 0x0f,
157         0x03, 0x06, 0x03, 0x01,
158         0x03, 0x01, 0x03, 0x00,
159         0x03, 0x09, 0x03, 0x09,
160         0x03, 0x00, 0x02, 0x00
161 };
162
163 static char mcchannelid[] __devinitdata =  {
164         0x04, 0x0d, 0x04, 0x01,
165         0x05, 0x02, 0x05, 0x03,
166         0x03, 0x06, 0x03, 0x03,
167         0x05, 0x08, 0x03, 0x04,
168         0x03, 0x05, 0x03, 0x01,
169         0x03, 0x08, 0x02, 0x00
170 };
171
172 static char __devinit *adapter_def(char type)
173 {
174         switch (type) {
175         case 0xF: return "PC Adapter | PC Adapter II | Adapter/A";
176         case 0xE: return "16/4 Adapter | 16/4 Adapter/A (long)";
177         case 0xD: return "16/4 Adapter/A (short) | 16/4 ISA-16 Adapter";
178         case 0xC: return "Auto 16/4 Adapter";
179         default: return "adapter (unknown type)";
180         };
181 };
182
183 #define TRC_INIT 0x01           /*  Trace initialization & PROBEs */
184 #define TRC_INITV 0x02          /*  verbose init trace points     */
185 static unsigned char ibmtr_debug_trace = 0;
186
187 static int      ibmtr_probe1(struct net_device *dev, int ioaddr);
188 static unsigned char get_sram_size(struct tok_info *adapt_info);
189 static int      trdev_init(struct net_device *dev);
190 static int      tok_open(struct net_device *dev);
191 static int      tok_init_card(struct net_device *dev);
192 static void     tok_open_adapter(unsigned long dev_addr);
193 static void     open_sap(unsigned char type, struct net_device *dev);
194 static void     tok_set_multicast_list(struct net_device *dev);
195 static netdev_tx_t tok_send_packet(struct sk_buff *skb,
196                                          struct net_device *dev);
197 static int      tok_close(struct net_device *dev);
198 static irqreturn_t tok_interrupt(int irq, void *dev_id);
199 static void     initial_tok_int(struct net_device *dev);
200 static void     tr_tx(struct net_device *dev);
201 static void     tr_rx(struct net_device *dev);
202 static void     ibmtr_reset_timer(struct timer_list*tmr,struct net_device *dev);
203 static void     tok_rerun(unsigned long dev_addr);
204 static void     ibmtr_readlog(struct net_device *dev);
205 static int      ibmtr_change_mtu(struct net_device *dev, int mtu);
206 static void     find_turbo_adapters(int *iolist);
207
208 static int ibmtr_portlist[IBMTR_MAX_ADAPTERS+1] __devinitdata = {
209         0xa20, 0xa24, 0, 0, 0
210 };
211 static int __devinitdata turbo_io[IBMTR_MAX_ADAPTERS] = {0};
212 static int __devinitdata turbo_irq[IBMTR_MAX_ADAPTERS] = {0};
213 static int __devinitdata turbo_searched = 0;
214
215 #ifndef PCMCIA
216 static __u32 ibmtr_mem_base __devinitdata = 0xd0000;
217 #endif
218
219 static void __devinit PrtChanID(char *pcid, short stride)
220 {
221         short i, j;
222         for (i = 0, j = 0; i < 24; i++, j += stride)
223                 printk("%1x", ((int) pcid[j]) & 0x0f);
224         printk("\n");
225 }
226
227 static void __devinit HWPrtChanID(void __iomem *pcid, short stride)
228 {
229         short i, j;
230         for (i = 0, j = 0; i < 24; i++, j += stride)
231                 printk("%1x", ((int) readb(pcid + j)) & 0x0f);
232         printk("\n");
233 }
234
235 /* We have to ioremap every checked address, because isa_readb is 
236  * going away. 
237  */
238
239 static void __devinit find_turbo_adapters(int *iolist)
240 {
241         int ram_addr;
242         int index=0;
243         void __iomem *chanid;
244         int found_turbo=0;
245         unsigned char *tchanid, ctemp;
246         int i, j;
247         unsigned long jif;
248         void __iomem *ram_mapped ;   
249
250         if (turbo_searched == 1) return;
251         turbo_searched=1;
252         for (ram_addr=0xC0000; ram_addr < 0xE0000; ram_addr+=0x2000) {
253
254                 __u32 intf_tbl=0;
255
256                 found_turbo=1;
257                 ram_mapped = ioremap((u32)ram_addr,0x1fff) ; 
258                 if (ram_mapped==NULL) 
259                         continue ; 
260                 chanid=(CHANNEL_ID + ram_mapped);
261                 tchanid=pcchannelid;
262                 ctemp=readb(chanid) & 0x0f;
263                 if (ctemp != *tchanid) continue;
264                 for (i=2,j=1; i<=46; i=i+2,j++) {
265                         if ((readb(chanid+i) & 0x0f) != tchanid[j]){
266                                 found_turbo=0;
267                                 break;
268                         }
269                 }
270                 if (!found_turbo) continue;
271
272                 writeb(0x90, ram_mapped+0x1E01);
273                 for(i=2; i<0x0f; i++) {
274                         writeb(0x00, ram_mapped+0x1E01+i);
275                 }
276                 writeb(0x00, ram_mapped+0x1E01);
277                 for(jif=jiffies+TR_BUSY_INTERVAL; time_before_eq(jiffies,jif););
278                 intf_tbl=ntohs(readw(ram_mapped+ACA_OFFSET+ACA_RW+WRBR_EVEN));
279                 if (intf_tbl) {
280 #if IBMTR_DEBUG_MESSAGES
281                         printk("ibmtr::find_turbo_adapters, Turbo found at "
282                                 "ram_addr %x\n",ram_addr);
283                         printk("ibmtr::find_turbo_adapters, interface_table ");
284                         for(i=0; i<6; i++) {
285                                 printk("%x:",readb(ram_addr+intf_tbl+i));
286                         }
287                         printk("\n");
288 #endif
289                         turbo_io[index]=ntohs(readw(ram_mapped+intf_tbl+4));
290                         turbo_irq[index]=readb(ram_mapped+intf_tbl+3);
291                         outb(0, turbo_io[index] + ADAPTRESET);
292                         for(jif=jiffies+TR_RST_TIME;time_before_eq(jiffies,jif););
293                         outb(0, turbo_io[index] + ADAPTRESETREL);
294                         index++;
295                         continue;
296                 }
297 #if IBMTR_DEBUG_MESSAGES 
298                 printk("ibmtr::find_turbo_adapters, ibmtr card found at"
299                         " %x but not a Turbo model\n",ram_addr);
300 #endif
301         iounmap(ram_mapped) ;   
302         } /* for */
303         for(i=0; i<IBMTR_MAX_ADAPTERS; i++) {
304                 if(!turbo_io[i]) break;
305                 for (j=0; j<IBMTR_MAX_ADAPTERS; j++) {
306                         if ( iolist[j] && iolist[j] != turbo_io[i]) continue;
307                         iolist[j]=turbo_io[i];
308                         break;
309                 }
310         }
311 }
312
313 static void ibmtr_cleanup_card(struct net_device *dev)
314 {
315         if (dev->base_addr) {
316                 outb(0,dev->base_addr+ADAPTRESET);
317                 
318                 schedule_timeout_uninterruptible(TR_RST_TIME); /* wait 50ms */
319
320                 outb(0,dev->base_addr+ADAPTRESETREL);
321         }
322
323 #ifndef PCMCIA
324         free_irq(dev->irq, dev);
325         release_region(dev->base_addr, IBMTR_IO_EXTENT);
326
327         { 
328                 struct tok_info *ti = netdev_priv(dev);
329                 iounmap(ti->mmio);
330                 iounmap(ti->sram_virt);
331         }
332 #endif          
333 }
334
335 /****************************************************************************
336  *      ibmtr_probe():  Routine specified in the network device structure
337  *      to probe for an IBM Token Ring Adapter.  Routine outline:
338  *      I.    Interrogate hardware to determine if an adapter exists
339  *            and what the speeds and feeds are
340  *      II.   Setup data structures to control execution based upon
341  *            adapter characteristics.
342  *
343  *      We expect ibmtr_probe to be called once for each device entry
344  *      which references it.
345  ****************************************************************************/
346
347 static int __devinit ibmtr_probe(struct net_device *dev)
348 {
349         int i;
350         int base_addr = dev->base_addr;
351
352         if (base_addr && base_addr <= 0x1ff) /* Don't probe at all. */
353                 return -ENXIO;
354         if (base_addr > 0x1ff) { /* Check a single specified location.  */
355                 if (!ibmtr_probe1(dev, base_addr)) return 0;
356                 return -ENODEV;
357         }
358         find_turbo_adapters(ibmtr_portlist);
359         for (i = 0; ibmtr_portlist[i]; i++) {
360                 int ioaddr = ibmtr_portlist[i];
361
362                 if (!ibmtr_probe1(dev, ioaddr)) return 0;
363         }
364         return -ENODEV;
365 }
366
367 int __devinit ibmtr_probe_card(struct net_device *dev)
368 {
369         int err = ibmtr_probe(dev);
370         if (!err) {
371                 err = register_netdev(dev);
372                 if (err)
373                         ibmtr_cleanup_card(dev);
374         }
375         return err;
376 }
377
378 /*****************************************************************************/
379
380 static int __devinit ibmtr_probe1(struct net_device *dev, int PIOaddr)
381 {
382
383         unsigned char segment, intr=0, irq=0, i, j, cardpresent=NOTOK, temp=0;
384         void __iomem * t_mmio = NULL;
385         struct tok_info *ti = netdev_priv(dev);
386         void __iomem *cd_chanid;
387         unsigned char *tchanid, ctemp;
388 #ifndef PCMCIA
389         unsigned char t_irq=0;
390         unsigned long timeout;
391         static int version_printed;
392 #endif
393
394         /*    Query the adapter PIO base port which will return
395          *    indication of where MMIO was placed. We also have a
396          *    coded interrupt number.
397          */
398         segment = inb(PIOaddr);
399         if (segment < 0x40 || segment > 0xe0) {
400                 /* Out of range values so we'll assume non-existent IO device
401                  * but this is not necessarily a problem, esp if a turbo
402                  * adapter is being used.  */
403 #if IBMTR_DEBUG_MESSAGES
404                 DPRINTK("ibmtr_probe1(): unhappy that inb(0x%X) == 0x%X, "
405                         "Hardware Problem?\n",PIOaddr,segment);
406 #endif
407                 return -ENODEV;
408         }
409         /*
410          *    Compute the linear base address of the MMIO area
411          *    as LINUX doesn't care about segments
412          */
413         t_mmio = ioremap(((__u32) (segment & 0xfc) << 11) + 0x80000,2048);
414         if (!t_mmio) { 
415                 DPRINTK("Cannot remap mmiobase memory area") ; 
416                 return -ENODEV ; 
417         } 
418         intr = segment & 0x03;  /* low bits is coded interrupt # */
419         if (ibmtr_debug_trace & TRC_INIT)
420                 DPRINTK("PIOaddr: %4hx seg/intr: %2x mmio base: %p intr: %d\n"
421                                 , PIOaddr, (int) segment, t_mmio, (int) intr);
422
423         /*
424          *    Now we will compare expected 'channelid' strings with
425          *    what we is there to learn of ISA/MCA or not TR card
426          */
427 #ifdef PCMCIA
428         iounmap(t_mmio);
429         t_mmio = ti->mmio;      /*BMS to get virtual address */
430         irq = ti->irq;          /*BMS to display the irq!   */
431 #endif
432         cd_chanid = (CHANNEL_ID + t_mmio);      /* for efficiency */
433         tchanid = pcchannelid;
434         cardpresent = TR_ISA;   /* try ISA */
435
436         /*    Suboptimize knowing first byte different */
437         ctemp = readb(cd_chanid) & 0x0f;
438         if (ctemp != *tchanid) {        /* NOT ISA card, try MCA */
439                 tchanid = mcchannelid;
440                 cardpresent = TR_MCA;
441                 if (ctemp != *tchanid)  /* Neither ISA nor MCA */
442                         cardpresent = NOTOK;
443         }
444         if (cardpresent != NOTOK) {
445                 /*       Know presumed type, try rest of ID */
446                 for (i = 2, j = 1; i <= 46; i = i + 2, j++) {
447                         if( (readb(cd_chanid+i)&0x0f) == tchanid[j]) continue;
448                         /* match failed, not TR card */
449                         cardpresent = NOTOK;
450                         break;
451                 }
452         }
453         /* 
454          *    If we have an ISA board check for the ISA P&P version,
455          *    as it has different IRQ settings 
456          */
457         if (cardpresent == TR_ISA && (readb(AIPFID + t_mmio) == 0x0e))
458                 cardpresent = TR_ISAPNP;
459         if (cardpresent == NOTOK) {     /* "channel_id" did not match, report */
460                 if (!(ibmtr_debug_trace & TRC_INIT)) {
461 #ifndef PCMCIA
462                         iounmap(t_mmio);
463 #endif
464                         return -ENODEV;
465                 }
466                 DPRINTK( "Channel ID string not found for PIOaddr: %4hx\n",
467                                                                 PIOaddr);
468                 DPRINTK("Expected for ISA: ");
469                 PrtChanID(pcchannelid, 1);
470                 DPRINTK("           found: ");
471 /* BMS Note that this can be misleading, when hardware is flaky, because you
472    are reading it a second time here. So with my flaky hardware, I'll see my-
473    self in this block, with the HW ID matching the ISA ID exactly! */
474                 HWPrtChanID(cd_chanid, 2);
475                 DPRINTK("Expected for MCA: ");
476                 PrtChanID(mcchannelid, 1);
477         }
478         /* Now, setup some of the pl0 buffers for this driver.. */
479         /* If called from PCMCIA, it is already set up, so no need to 
480            waste the memory, just use the existing structure */
481 #ifndef PCMCIA
482         ti->mmio = t_mmio;
483         for (i = 0; i < IBMTR_MAX_ADAPTERS; i++) {
484                 if (turbo_io[i] != PIOaddr)
485                         continue;
486 #if IBMTR_DEBUG_MESSAGES 
487                 printk("ibmtr::tr_probe1, setting PIOaddr %x to Turbo\n",
488                        PIOaddr);
489 #endif
490                 ti->turbo = 1;
491                 t_irq = turbo_irq[i];
492         }
493 #endif /* !PCMCIA */
494         ti->readlog_pending = 0;
495         init_waitqueue_head(&ti->wait_for_reset);
496
497         /* if PCMCIA, the card can be recognized as either TR_ISA or TR_ISAPNP
498          * depending which card is inserted.    */
499         
500 #ifndef PCMCIA
501         switch (cardpresent) {
502         case TR_ISA:
503                 if (intr == 0) irq = 9; /* irq2 really is irq9 */
504                 if (intr == 1) irq = 3;
505                 if (intr == 2) irq = 6;
506                 if (intr == 3) irq = 7;
507                 ti->adapter_int_enable = PIOaddr + ADAPTINTREL;
508                 break;
509         case TR_MCA:
510                 if (intr == 0) irq = 9;
511                 if (intr == 1) irq = 3;
512                 if (intr == 2) irq = 10;
513                 if (intr == 3) irq = 11;
514                 ti->global_int_enable = 0;
515                 ti->adapter_int_enable = 0;
516                 ti->sram_phys=(__u32)(inb(PIOaddr+ADAPTRESETREL) & 0xfe) << 12;
517                 break;
518         case TR_ISAPNP:
519                 if (!t_irq) {
520                         if (intr == 0) irq = 9;
521                         if (intr == 1) irq = 3;
522                         if (intr == 2) irq = 10;
523                         if (intr == 3) irq = 11;
524                 } else
525                         irq=t_irq;
526                 timeout = jiffies + TR_SPIN_INTERVAL;
527                 while (!readb(ti->mmio + ACA_OFFSET + ACA_RW + RRR_EVEN)){
528                         if (!time_after(jiffies, timeout)) continue;
529                         DPRINTK( "Hardware timeout during initialization.\n");
530                         iounmap(t_mmio);
531                         return -ENODEV;
532                 }
533                 ti->sram_phys =
534                      ((__u32)readb(ti->mmio+ACA_OFFSET+ACA_RW+RRR_EVEN)<<12);
535                 ti->adapter_int_enable = PIOaddr + ADAPTINTREL;
536                 break;
537         } /*end switch (cardpresent) */
538 #endif  /*not PCMCIA */
539
540         if (ibmtr_debug_trace & TRC_INIT) {     /* just report int */
541                 DPRINTK("irq=%d", irq);
542                 printk(", sram_phys=0x%x", ti->sram_phys);
543                 if(ibmtr_debug_trace&TRC_INITV){ /* full chat in verbose only */
544                         DPRINTK(", ti->mmio=%p", ti->mmio);
545                         printk(", segment=%02X", segment);
546                 }
547                 printk(".\n");
548         }
549
550         /* Get hw address of token ring card */
551         j = 0;
552         for (i = 0; i < 0x18; i = i + 2) {
553                 /* technical reference states to do this */
554                 temp = readb(ti->mmio + AIP + i) & 0x0f;
555                 ti->hw_address[j] = temp;
556                 if (j & 1)
557                         dev->dev_addr[(j / 2)] =
558                                 ti->hw_address[j]+ (ti->hw_address[j - 1] << 4);
559                 ++j;
560         }
561         /* get Adapter type:  'F' = Adapter/A, 'E' = 16/4 Adapter II,... */
562         ti->adapter_type = readb(ti->mmio + AIPADAPTYPE);
563
564         /* get Data Rate:  F=4Mb, E=16Mb, D=4Mb & 16Mb ?? */
565         ti->data_rate = readb(ti->mmio + AIPDATARATE);
566
567         /* Get Early Token Release support?: F=no, E=4Mb, D=16Mb, C=4&16Mb */
568         ti->token_release = readb(ti->mmio + AIPEARLYTOKEN);
569
570         /* How much shared RAM is on adapter ? */
571         if (ti->turbo) {
572                 ti->avail_shared_ram=127;
573         } else {
574                 ti->avail_shared_ram = get_sram_size(ti);/*in 512 byte units */
575         }
576         /* We need to set or do a bunch of work here based on previous results*/
577         /* Support paging?  What sizes?:  F=no, E=16k, D=32k, C=16 & 32k */
578         ti->shared_ram_paging = readb(ti->mmio + AIPSHRAMPAGE);
579
580         /* Available DHB  4Mb size:   F=2048, E=4096, D=4464 */
581         switch (readb(ti->mmio + AIP4MBDHB)) {
582         case 0xe: ti->dhb_size4mb = 4096; break;
583         case 0xd: ti->dhb_size4mb = 4464; break;
584         default:  ti->dhb_size4mb = 2048; break;
585         }
586
587         /* Available DHB 16Mb size:  F=2048, E=4096, D=8192, C=16384, B=17960 */
588         switch (readb(ti->mmio + AIP16MBDHB)) {
589         case 0xe: ti->dhb_size16mb = 4096; break;
590         case 0xd: ti->dhb_size16mb = 8192; break;
591         case 0xc: ti->dhb_size16mb = 16384; break;
592         case 0xb: ti->dhb_size16mb = 17960; break;
593         default:  ti->dhb_size16mb = 2048; break;
594         }
595
596         /*    We must figure out how much shared memory space this adapter
597          *    will occupy so that if there are two adapters we can fit both
598          *    in.  Given a choice, we will limit this adapter to 32K.  The
599          *    maximum space will will use for two adapters is 64K so if the
600          *    adapter we are working on demands 64K (it also doesn't support
601          *    paging), then only one adapter can be supported.  
602          */
603
604         /*
605          *    determine how much of total RAM is mapped into PC space 
606          */
607         ti->mapped_ram_size= /*sixteen to onehundredtwentyeight 512byte blocks*/
608             1<< ((readb(ti->mmio+ACA_OFFSET+ACA_RW+RRR_ODD) >> 2 & 0x03) + 4);
609         ti->page_mask = 0;
610         if (ti->turbo)  ti->page_mask=0xf0;
611         else if (ti->shared_ram_paging == 0xf);  /* No paging in adapter */
612         else {
613 #ifdef ENABLE_PAGING
614                 unsigned char pg_size = 0;
615                 /* BMS:   page size: PCMCIA, use configuration register;
616                    ISAPNP, use LANAIDC config tool from www.ibm.com  */
617                 switch (ti->shared_ram_paging) {
618                 case 0xf:
619                         break;
620                 case 0xe:
621                         ti->page_mask = (ti->mapped_ram_size == 32) ? 0xc0 : 0;
622                         pg_size = 32;   /* 16KB page size */
623                         break;
624                 case 0xd:
625                         ti->page_mask = (ti->mapped_ram_size == 64) ? 0x80 : 0;
626                         pg_size = 64;   /* 32KB page size */
627                         break;
628                 case 0xc:
629                         switch (ti->mapped_ram_size) {
630                         case 32:
631                                 ti->page_mask = 0xc0;
632                                 pg_size = 32;
633                                 break;
634                         case 64:
635                                 ti->page_mask = 0x80;
636                                 pg_size = 64;
637                                 break;
638                         }
639                         break;
640                 default:
641                         DPRINTK("Unknown shared ram paging info %01X\n",
642                                                         ti->shared_ram_paging);
643                         iounmap(t_mmio); 
644                         return -ENODEV;
645                         break;
646                 } /*end switch shared_ram_paging */
647
648                 if (ibmtr_debug_trace & TRC_INIT)
649                         DPRINTK("Shared RAM paging code: %02X, "
650                                 "mapped RAM size: %dK, shared RAM size: %dK, "
651                                 "page mask: %02X\n:",
652                                 ti->shared_ram_paging, ti->mapped_ram_size / 2,
653                                 ti->avail_shared_ram / 2, ti->page_mask);
654 #endif  /*ENABLE_PAGING */
655         }
656
657 #ifndef PCMCIA
658         /* finish figuring the shared RAM address */
659         if (cardpresent == TR_ISA) {
660                 static __u32 ram_bndry_mask[] =
661                         { 0xffffe000, 0xffffc000, 0xffff8000, 0xffff0000 };
662                 __u32 new_base, rrr_32, chk_base, rbm;
663
664                 rrr_32=readb(ti->mmio+ACA_OFFSET+ACA_RW+RRR_ODD) >> 2 & 0x03;
665                 rbm = ram_bndry_mask[rrr_32];
666                 new_base = (ibmtr_mem_base + (~rbm)) & rbm;/* up to boundary */
667                 chk_base = new_base + (ti->mapped_ram_size << 9);
668                 if (chk_base > (ibmtr_mem_base + IBMTR_SHARED_RAM_SIZE)) {
669                         DPRINTK("Shared RAM for this adapter (%05x) exceeds "
670                         "driver limit (%05x), adapter not started.\n",
671                         chk_base, ibmtr_mem_base + IBMTR_SHARED_RAM_SIZE);
672                         iounmap(t_mmio);
673                         return -ENODEV;
674                 } else { /* seems cool, record what we have figured out */
675                         ti->sram_base = new_base >> 12;
676                         ibmtr_mem_base = chk_base;
677                 }
678         }
679         else  ti->sram_base = ti->sram_phys >> 12;
680
681         /* The PCMCIA has already got the interrupt line and the io port, 
682            so no chance of anybody else getting it - MLP */
683         if (request_irq(dev->irq = irq, tok_interrupt, 0, "ibmtr", dev) != 0) {
684                 DPRINTK("Could not grab irq %d.  Halting Token Ring driver.\n",
685                                         irq);
686                 iounmap(t_mmio);
687                 return -ENODEV;
688         }
689         /*?? Now, allocate some of the PIO PORTs for this driver.. */
690         /* record PIOaddr range as busy */
691         if (!request_region(PIOaddr, IBMTR_IO_EXTENT, "ibmtr")) {
692                 DPRINTK("Could not grab PIO range. Halting driver.\n");
693                 free_irq(dev->irq, dev);
694                 iounmap(t_mmio);
695                 return -EBUSY;
696         }
697
698         if (!version_printed++) {
699                 printk(version);
700         }
701 #endif /* !PCMCIA */
702         DPRINTK("%s %s found\n",
703                 channel_def[cardpresent - 1], adapter_def(ti->adapter_type));
704         DPRINTK("using irq %d, PIOaddr %hx, %dK shared RAM.\n",
705                         irq, PIOaddr, ti->mapped_ram_size / 2);
706         DPRINTK("Hardware address : %pM\n", dev->dev_addr);
707         if (ti->page_mask)
708                 DPRINTK("Shared RAM paging enabled. "
709                         "Page size: %uK Shared Ram size %dK\n",
710                         ((ti->page_mask^0xff)+1) >>2, ti->avail_shared_ram / 2);
711         else
712                 DPRINTK("Shared RAM paging disabled. ti->page_mask %x\n",
713                                                                 ti->page_mask);
714
715         /* Calculate the maximum DHB we can use */
716         /* two cases where avail_shared_ram doesn't equal mapped_ram_size:
717             1. avail_shared_ram is 127 but mapped_ram_size is 128 (typical)
718             2. user has configured adapter for less than avail_shared_ram
719                but is not using paging (she should use paging, I believe)
720         */
721         if (!ti->page_mask) {
722                 ti->avail_shared_ram=
723                                 min(ti->mapped_ram_size,ti->avail_shared_ram);
724         }
725
726         switch (ti->avail_shared_ram) {
727         case 16:                /* 8KB shared RAM */
728                 ti->dhb_size4mb = min(ti->dhb_size4mb, (unsigned short)2048);
729                 ti->rbuf_len4 = 1032;
730                 ti->rbuf_cnt4=2;
731                 ti->dhb_size16mb = min(ti->dhb_size16mb, (unsigned short)2048);
732                 ti->rbuf_len16 = 1032;
733                 ti->rbuf_cnt16=2;
734                 break;
735         case 32:                /* 16KB shared RAM */
736                 ti->dhb_size4mb = min(ti->dhb_size4mb, (unsigned short)4464);
737                 ti->rbuf_len4 = 1032;
738                 ti->rbuf_cnt4=4;
739                 ti->dhb_size16mb = min(ti->dhb_size16mb, (unsigned short)4096);
740                 ti->rbuf_len16 = 1032;  /*1024 usable */
741                 ti->rbuf_cnt16=4;
742                 break;
743         case 64:                /* 32KB shared RAM */
744                 ti->dhb_size4mb = min(ti->dhb_size4mb, (unsigned short)4464);
745                 ti->rbuf_len4 = 1032;
746                 ti->rbuf_cnt4=6;
747                 ti->dhb_size16mb = min(ti->dhb_size16mb, (unsigned short)10240);
748                 ti->rbuf_len16 = 1032;
749                 ti->rbuf_cnt16=6;
750                 break;
751         case 127:               /* 63.5KB shared RAM */
752                 ti->dhb_size4mb = min(ti->dhb_size4mb, (unsigned short)4464);
753                 ti->rbuf_len4 = 1032;
754                 ti->rbuf_cnt4=6;
755                 ti->dhb_size16mb = min(ti->dhb_size16mb, (unsigned short)16384);
756                 ti->rbuf_len16 = 1032;
757                 ti->rbuf_cnt16=16;
758                 break;
759         case 128:               /* 64KB   shared RAM */
760                 ti->dhb_size4mb = min(ti->dhb_size4mb, (unsigned short)4464);
761                 ti->rbuf_len4 = 1032;
762                 ti->rbuf_cnt4=6;
763                 ti->dhb_size16mb = min(ti->dhb_size16mb, (unsigned short)17960);
764                 ti->rbuf_len16 = 1032;
765                 ti->rbuf_cnt16=16;
766                 break;
767         default:
768                 ti->dhb_size4mb = 2048;
769                 ti->rbuf_len4 = 1032;
770                 ti->rbuf_cnt4=2;
771                 ti->dhb_size16mb = 2048;
772                 ti->rbuf_len16 = 1032;
773                 ti->rbuf_cnt16=2;
774                 break;
775         }
776         /* this formula is not smart enough for the paging case
777         ti->rbuf_cnt<x> = (ti->avail_shared_ram * BLOCKSZ - ADAPT_PRIVATE -
778                         ARBLENGTH - SSBLENGTH - DLC_MAX_SAP * SAPLENGTH -
779                         DLC_MAX_STA * STALENGTH - ti->dhb_size<x>mb * NUM_DHB -
780                         SRBLENGTH - ASBLENGTH) / ti->rbuf_len<x>;
781         */
782         ti->maxmtu16 = (ti->rbuf_len16 - 8) * ti->rbuf_cnt16  - TR_HLEN;
783         ti->maxmtu4 = (ti->rbuf_len4 - 8) * ti->rbuf_cnt4 - TR_HLEN;
784         /*BMS assuming 18 bytes of Routing Information (usually works) */
785         DPRINTK("Maximum Receive Internet Protocol MTU 16Mbps: %d, 4Mbps: %d\n",
786                                                      ti->maxmtu16, ti->maxmtu4);
787
788         dev->base_addr = PIOaddr;       /* set the value for device */
789         dev->mem_start = ti->sram_base << 12;
790         dev->mem_end = dev->mem_start + (ti->mapped_ram_size << 9) - 1;
791         trdev_init(dev);
792         return 0;   /* Return 0 to indicate we have found a Token Ring card. */
793 }                               /*ibmtr_probe1() */
794
795 /*****************************************************************************/
796
797 /* query the adapter for the size of shared RAM  */
798 /* the function returns the RAM size in units of 512 bytes */
799
800 static unsigned char __devinit get_sram_size(struct tok_info *adapt_info)
801 {
802         unsigned char avail_sram_code;
803         static unsigned char size_code[] = { 0, 16, 32, 64, 127, 128 };
804         /* Adapter gives
805            'F' -- use RRR bits 3,2
806            'E' -- 8kb   'D' -- 16kb
807            'C' -- 32kb  'A' -- 64KB
808            'B' - 64KB less 512 bytes at top
809            (WARNING ... must zero top bytes in INIT */
810
811         avail_sram_code = 0xf - readb(adapt_info->mmio + AIPAVAILSHRAM);
812         if (avail_sram_code) return size_code[avail_sram_code];
813         else            /* for code 'F', must compute size from RRR(3,2) bits */
814                 return 1 <<
815                  ((readb(adapt_info->mmio+ACA_OFFSET+ACA_RW+RRR_ODD)>>2&3)+4);
816 }
817
818 /*****************************************************************************/
819
820 static const struct net_device_ops trdev_netdev_ops = {
821         .ndo_open               = tok_open,
822         .ndo_stop               = tok_close,
823         .ndo_start_xmit         = tok_send_packet,
824         .ndo_set_multicast_list = tok_set_multicast_list,
825         .ndo_change_mtu         = ibmtr_change_mtu,
826 };
827
828 static int __devinit trdev_init(struct net_device *dev)
829 {
830         struct tok_info *ti = netdev_priv(dev);
831
832         SET_PAGE(ti->srb_page);
833         ti->open_failure = NO    ;
834         dev->netdev_ops = &trdev_netdev_ops;
835
836         return 0;
837 }
838
839 /*****************************************************************************/
840
841 static int tok_init_card(struct net_device *dev)
842 {
843         struct tok_info *ti;
844         short PIOaddr;
845         unsigned long i;
846
847         PIOaddr = dev->base_addr;
848         ti = netdev_priv(dev);
849         /* Special processing for first interrupt after reset */
850         ti->do_tok_int = FIRST_INT;
851         /* Reset adapter */
852         writeb(~INT_ENABLE, ti->mmio + ACA_OFFSET + ACA_RESET + ISRP_EVEN);
853         outb(0, PIOaddr + ADAPTRESET);
854
855         schedule_timeout_uninterruptible(TR_RST_TIME); /* wait 50ms */
856
857         outb(0, PIOaddr + ADAPTRESETREL);
858 #ifdef ENABLE_PAGING
859         if (ti->page_mask)
860                 writeb(SRPR_ENABLE_PAGING,ti->mmio+ACA_OFFSET+ACA_RW+SRPR_EVEN);
861 #endif
862         writeb(INT_ENABLE, ti->mmio + ACA_OFFSET + ACA_SET + ISRP_EVEN);
863         i = sleep_on_timeout(&ti->wait_for_reset, 4 * HZ);
864         return i? 0 : -EAGAIN;
865 }
866
867 /*****************************************************************************/
868 static int tok_open(struct net_device *dev)
869 {
870         struct tok_info *ti = netdev_priv(dev);
871         int i;
872
873         /*the case we were left in a failure state during a previous open */
874         if (ti->open_failure == YES) {
875                 DPRINTK("Last time you were disconnected, how about now?\n");
876                 printk("You can't insert with an ICS connector half-cocked.\n");
877         }
878
879         ti->open_status  = CLOSED; /* CLOSED or OPEN      */
880         ti->sap_status   = CLOSED; /* CLOSED or OPEN      */
881         ti->open_failure =     NO; /* NO     or YES       */
882         ti->open_mode    = MANUAL; /* MANUAL or AUTOMATIC */
883
884         ti->sram_phys &= ~1; /* to reverse what we do in tok_close */
885         /* init the spinlock */
886         spin_lock_init(&ti->lock);
887         init_timer(&ti->tr_timer);
888         
889         i = tok_init_card(dev);
890         if (i) return i;
891
892         while (1){
893                 tok_open_adapter((unsigned long) dev);
894                 i= interruptible_sleep_on_timeout(&ti->wait_for_reset, 25 * HZ);
895                 /* sig catch: estimate opening adapter takes more than .5 sec*/
896                 if (i>(245*HZ)/10) break; /* fancier than if (i==25*HZ) */
897                 if (i==0) break;
898                 if (ti->open_status == OPEN && ti->sap_status==OPEN) {
899                         netif_start_queue(dev);
900                         DPRINTK("Adapter is up and running\n");
901                         return 0;
902                 }
903                 i=schedule_timeout_interruptible(TR_RETRY_INTERVAL);
904                                                         /* wait 30 seconds */
905                 if(i!=0) break; /*prob. a signal, like the i>24*HZ case above */
906         }
907         outb(0, dev->base_addr + ADAPTRESET);/* kill pending interrupts*/
908         DPRINTK("TERMINATED via signal\n");     /*BMS useful */
909         return -EAGAIN;
910 }
911
912 /*****************************************************************************/
913
914 #define COMMAND_OFST             0
915 #define OPEN_OPTIONS_OFST        8
916 #define NUM_RCV_BUF_OFST        24
917 #define RCV_BUF_LEN_OFST        26
918 #define DHB_LENGTH_OFST         28
919 #define NUM_DHB_OFST            30
920 #define DLC_MAX_SAP_OFST        32
921 #define DLC_MAX_STA_OFST        33
922
923 static void tok_open_adapter(unsigned long dev_addr)
924 {
925         struct net_device *dev = (struct net_device *) dev_addr;
926         struct tok_info *ti;
927         int i;
928
929         ti = netdev_priv(dev);
930         SET_PAGE(ti->init_srb_page); 
931         writeb(~SRB_RESP_INT, ti->mmio + ACA_OFFSET + ACA_RESET + ISRP_ODD);
932         for (i = 0; i < sizeof(struct dir_open_adapter); i++)
933                 writeb(0, ti->init_srb + i);
934         writeb(DIR_OPEN_ADAPTER, ti->init_srb + COMMAND_OFST);
935         writew(htons(OPEN_PASS_BCON_MAC), ti->init_srb + OPEN_OPTIONS_OFST);
936         if (ti->ring_speed == 16) {
937                 writew(htons(ti->dhb_size16mb), ti->init_srb + DHB_LENGTH_OFST);
938                 writew(htons(ti->rbuf_cnt16), ti->init_srb + NUM_RCV_BUF_OFST);
939                 writew(htons(ti->rbuf_len16), ti->init_srb + RCV_BUF_LEN_OFST);
940         } else {
941                 writew(htons(ti->dhb_size4mb), ti->init_srb + DHB_LENGTH_OFST);
942                 writew(htons(ti->rbuf_cnt4), ti->init_srb + NUM_RCV_BUF_OFST);
943                 writew(htons(ti->rbuf_len4), ti->init_srb + RCV_BUF_LEN_OFST);
944         }
945         writeb(NUM_DHB,         /* always 2 */ ti->init_srb + NUM_DHB_OFST);
946         writeb(DLC_MAX_SAP, ti->init_srb + DLC_MAX_SAP_OFST);
947         writeb(DLC_MAX_STA, ti->init_srb + DLC_MAX_STA_OFST);
948         ti->srb = ti->init_srb; /* We use this one in the interrupt handler */
949         ti->srb_page = ti->init_srb_page;
950         DPRINTK("Opening adapter: Xmit bfrs: %d X %d, Rcv bfrs: %d X %d\n",
951                 readb(ti->init_srb + NUM_DHB_OFST),
952                 ntohs(readw(ti->init_srb + DHB_LENGTH_OFST)),
953                 ntohs(readw(ti->init_srb + NUM_RCV_BUF_OFST)),
954                 ntohs(readw(ti->init_srb + RCV_BUF_LEN_OFST)));
955         writeb(INT_ENABLE, ti->mmio + ACA_OFFSET + ACA_SET + ISRP_EVEN);
956         writeb(CMD_IN_SRB, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD);
957 }
958
959 /*****************************************************************************/
960
961 static void open_sap(unsigned char type, struct net_device *dev)
962 {
963         int i;
964         struct tok_info *ti = netdev_priv(dev);
965
966         SET_PAGE(ti->srb_page);
967         for (i = 0; i < sizeof(struct dlc_open_sap); i++)
968                 writeb(0, ti->srb + i);
969
970 #define MAX_I_FIELD_OFST        14
971 #define SAP_VALUE_OFST          16
972 #define SAP_OPTIONS_OFST        17
973 #define STATION_COUNT_OFST      18
974
975         writeb(DLC_OPEN_SAP, ti->srb + COMMAND_OFST);
976         writew(htons(MAX_I_FIELD), ti->srb + MAX_I_FIELD_OFST);
977         writeb(SAP_OPEN_IND_SAP | SAP_OPEN_PRIORITY, ti->srb+ SAP_OPTIONS_OFST);
978         writeb(SAP_OPEN_STATION_CNT, ti->srb + STATION_COUNT_OFST);
979         writeb(type, ti->srb + SAP_VALUE_OFST);
980         writeb(CMD_IN_SRB, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD);
981 }
982
983
984 /*****************************************************************************/
985
986 static void tok_set_multicast_list(struct net_device *dev)
987 {
988         struct tok_info *ti = netdev_priv(dev);
989         struct dev_mc_list *mclist;
990         unsigned char address[4];
991
992         int i;
993
994         /*BMS the next line is CRUCIAL or you may be sad when you */
995         /*BMS ifconfig tr down or hot unplug a PCMCIA card ??hownowbrowncow*/
996         if (/*BMSHELPdev->start == 0 ||*/ ti->open_status != OPEN) return;
997         address[0] = address[1] = address[2] = address[3] = 0;
998         mclist = dev->mc_list;
999         for (i = 0; i < dev->mc_count; i++) {
1000                 address[0] |= mclist->dmi_addr[2];
1001                 address[1] |= mclist->dmi_addr[3];
1002                 address[2] |= mclist->dmi_addr[4];
1003                 address[3] |= mclist->dmi_addr[5];
1004                 mclist = mclist->next;
1005         }
1006         SET_PAGE(ti->srb_page);
1007         for (i = 0; i < sizeof(struct srb_set_funct_addr); i++)
1008                 writeb(0, ti->srb + i);
1009
1010 #define FUNCT_ADDRESS_OFST 6
1011
1012         writeb(DIR_SET_FUNC_ADDR, ti->srb + COMMAND_OFST);
1013         for (i = 0; i < 4; i++) 
1014                 writeb(address[i], ti->srb + FUNCT_ADDRESS_OFST + i);
1015         writeb(CMD_IN_SRB, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD);
1016 #if TR_VERBOSE
1017         DPRINTK("Setting functional address: ");
1018         for (i=0;i<4;i++)  printk("%02X ", address[i]);
1019         printk("\n");
1020 #endif
1021 }
1022
1023 /*****************************************************************************/
1024
1025 #define STATION_ID_OFST 4
1026
1027 static netdev_tx_t tok_send_packet(struct sk_buff *skb,
1028                                          struct net_device *dev)
1029 {
1030         struct tok_info *ti;
1031         unsigned long flags;
1032         ti = netdev_priv(dev);
1033
1034         netif_stop_queue(dev);
1035
1036         /* lock against other CPUs */
1037         spin_lock_irqsave(&(ti->lock), flags);
1038
1039         /* Save skb; we'll need it when the adapter asks for the data */
1040         ti->current_skb = skb;
1041         SET_PAGE(ti->srb_page);
1042         writeb(XMIT_UI_FRAME, ti->srb + COMMAND_OFST);
1043         writew(ti->exsap_station_id, ti->srb + STATION_ID_OFST);
1044         writeb(CMD_IN_SRB, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD);
1045         spin_unlock_irqrestore(&(ti->lock), flags);
1046         dev->trans_start = jiffies;
1047         return NETDEV_TX_OK;
1048 }
1049
1050 /*****************************************************************************/
1051
1052 static int tok_close(struct net_device *dev)
1053 {
1054         struct tok_info *ti = netdev_priv(dev);
1055
1056         /* Important for PCMCIA hot unplug, otherwise, we'll pull the card, */
1057         /* unloading the module from memory, and then if a timer pops, ouch */
1058         del_timer_sync(&ti->tr_timer);
1059         outb(0, dev->base_addr + ADAPTRESET);
1060         ti->sram_phys |= 1;
1061         ti->open_status = CLOSED;
1062
1063         netif_stop_queue(dev);
1064         DPRINTK("Adapter is closed.\n");
1065         return 0;
1066 }
1067
1068 /*****************************************************************************/
1069
1070 #define RETCODE_OFST            2
1071 #define OPEN_ERROR_CODE_OFST    6
1072 #define ASB_ADDRESS_OFST        8
1073 #define SRB_ADDRESS_OFST        10
1074 #define ARB_ADDRESS_OFST        12
1075 #define SSB_ADDRESS_OFST        14
1076
1077 static char *printphase[]= {"Lobe media test","Physical insertion",
1078               "Address verification","Roll call poll","Request Parameters"};
1079 static char *printerror[]={"Function failure","Signal loss","Reserved",
1080                 "Frequency error","Timeout","Ring failure","Ring beaconing",
1081                 "Duplicate node address",
1082                 "Parameter request-retry count exceeded","Remove received",
1083                 "IMPL force received","Duplicate modifier",
1084                 "No monitor detected","Monitor contention failed for RPL"};
1085
1086 static void __iomem *map_address(struct tok_info *ti, unsigned index, __u8 *page)
1087 {
1088         if (ti->page_mask) {
1089                 *page = (index >> 8) & ti->page_mask;
1090                 index &= ~(ti->page_mask << 8);
1091         }
1092         return ti->sram_virt + index;
1093 }
1094
1095 static void dir_open_adapter (struct net_device *dev)
1096 {
1097         struct tok_info *ti = netdev_priv(dev);
1098         unsigned char ret_code;
1099         __u16 err;
1100
1101         ti->srb = map_address(ti,
1102                 ntohs(readw(ti->init_srb + SRB_ADDRESS_OFST)),
1103                 &ti->srb_page);
1104         ti->ssb = map_address(ti,
1105                 ntohs(readw(ti->init_srb + SSB_ADDRESS_OFST)),
1106                 &ti->ssb_page);
1107         ti->arb = map_address(ti,
1108                 ntohs(readw(ti->init_srb + ARB_ADDRESS_OFST)),
1109                 &ti->arb_page);
1110         ti->asb = map_address(ti,
1111                 ntohs(readw(ti->init_srb + ASB_ADDRESS_OFST)),
1112                 &ti->asb_page);
1113         ti->current_skb = NULL;
1114         ret_code = readb(ti->init_srb + RETCODE_OFST);
1115         err = ntohs(readw(ti->init_srb + OPEN_ERROR_CODE_OFST));
1116         if (!ret_code) {
1117                 ti->open_status = OPEN; /* TR adapter is now available */
1118                 if (ti->open_mode == AUTOMATIC) {
1119                         DPRINTK("Adapter reopened.\n");
1120                 }
1121                 writeb(~SRB_RESP_INT, ti->mmio+ACA_OFFSET+ACA_RESET+ISRP_ODD);
1122                 open_sap(EXTENDED_SAP, dev);
1123                 return;
1124         }
1125         ti->open_failure = YES;
1126         if (ret_code == 7){
1127                if (err == 0x24) {
1128                         if (!ti->auto_speedsave) {
1129                                 DPRINTK("Open failed: Adapter speed must match "
1130                                  "ring speed if Automatic Ring Speed Save is "
1131                                  "disabled.\n");
1132                                 ti->open_action = FAIL;
1133                         }else
1134                                 DPRINTK("Retrying open to adjust to "
1135                                         "ring speed, ");
1136                 } else if (err == 0x2d) {
1137                         DPRINTK("Physical Insertion: No Monitor Detected, ");
1138                         printk("retrying after %ds delay...\n",
1139                                         TR_RETRY_INTERVAL/HZ);
1140                 } else if (err == 0x11) {
1141                         DPRINTK("Lobe Media Function Failure (0x11), ");
1142                         printk(" retrying after %ds delay...\n",
1143                                         TR_RETRY_INTERVAL/HZ);
1144                 } else {
1145                         char **prphase = printphase;
1146                         char **prerror = printerror;
1147                         int pnr = err / 16 - 1;
1148                         int enr = err % 16 - 1;
1149                         DPRINTK("TR Adapter misc open failure, error code = ");
1150                         if (pnr < 0 || pnr >= ARRAY_SIZE(printphase) ||
1151                                         enr < 0 ||
1152                                         enr >= ARRAY_SIZE(printerror))
1153                                 printk("0x%x, invalid Phase/Error.", err);
1154                         else
1155                                 printk("0x%x, Phase: %s, Error: %s\n", err,
1156                                                 prphase[pnr], prerror[enr]);
1157                         printk(" retrying after %ds delay...\n",
1158                                         TR_RETRY_INTERVAL/HZ);
1159                 }
1160         } else DPRINTK("open failed: ret_code = %02X..., ", ret_code);
1161         if (ti->open_action != FAIL) {
1162                 if (ti->open_mode==AUTOMATIC){
1163                         ti->open_action = REOPEN;
1164                         ibmtr_reset_timer(&(ti->tr_timer), dev);
1165                         return;
1166                 }
1167                 wake_up(&ti->wait_for_reset);
1168                 return;
1169         }
1170         DPRINTK("FAILURE, CAPUT\n");
1171 }
1172
1173 /******************************************************************************/
1174
1175 static irqreturn_t tok_interrupt(int irq, void *dev_id)
1176 {
1177         unsigned char status;
1178         /*  unsigned char status_even ; */
1179         struct tok_info *ti;
1180         struct net_device *dev;
1181 #ifdef ENABLE_PAGING
1182         unsigned char save_srpr;
1183 #endif
1184
1185         dev = dev_id;
1186 #if TR_VERBOSE
1187         DPRINTK("Int from tok_driver, dev : %p irq%d\n", dev,irq);
1188 #endif
1189         ti = netdev_priv(dev);
1190         if (ti->sram_phys & 1)
1191                 return IRQ_NONE;         /* PCMCIA card extraction flag */
1192         spin_lock(&(ti->lock));
1193 #ifdef ENABLE_PAGING
1194         save_srpr = readb(ti->mmio + ACA_OFFSET + ACA_RW + SRPR_EVEN);
1195 #endif
1196
1197         /* Disable interrupts till processing is finished */
1198         writeb((~INT_ENABLE), ti->mmio + ACA_OFFSET + ACA_RESET + ISRP_EVEN);
1199
1200         /* Reset interrupt for ISA boards */
1201         if (ti->adapter_int_enable)
1202                 outb(0, ti->adapter_int_enable);
1203         else /* used for PCMCIA cards */
1204                 outb(0, ti->global_int_enable);
1205         if (ti->do_tok_int == FIRST_INT){
1206                 initial_tok_int(dev);
1207 #ifdef ENABLE_PAGING
1208                 writeb(save_srpr, ti->mmio + ACA_OFFSET + ACA_RW + SRPR_EVEN);
1209 #endif
1210                 spin_unlock(&(ti->lock));
1211                 return IRQ_HANDLED;
1212         }
1213         /*  Begin interrupt handler HERE inline to avoid the extra
1214             levels of logic and call depth for the original solution. */
1215         status = readb(ti->mmio + ACA_OFFSET + ACA_RW + ISRP_ODD);
1216         /*BMSstatus_even = readb (ti->mmio + ACA_OFFSET + ACA_RW + ISRP_EVEN) */
1217         /*BMSdebugprintk("tok_interrupt: ISRP_ODD = 0x%x ISRP_EVEN = 0x%x\n", */
1218         /*BMS                                       status,status_even);      */
1219
1220         if (status & ADAP_CHK_INT) {
1221                 int i;
1222                 void __iomem *check_reason;
1223                 __u8 check_reason_page = 0;
1224                 check_reason = map_address(ti,
1225                         ntohs(readw(ti->mmio+ ACA_OFFSET+ACA_RW + WWCR_EVEN)),
1226                         &check_reason_page);
1227                 SET_PAGE(check_reason_page);
1228
1229                 DPRINTK("Adapter check interrupt\n");
1230                 DPRINTK("8 reason bytes follow: ");
1231                 for (i = 0; i < 8; i++, check_reason++)
1232                         printk("%02X ", (int) readb(check_reason));
1233                 printk("\n");
1234                 writeb(~ADAP_CHK_INT, ti->mmio+ ACA_OFFSET+ACA_RESET+ ISRP_ODD);
1235                 status = readb(ti->mmio + ACA_OFFSET + ACA_RW + ISRA_EVEN);
1236                 DPRINTK("ISRA_EVEN == 0x02%x\n",status);
1237                 ti->open_status = CLOSED;
1238                 ti->sap_status  = CLOSED;
1239                 ti->open_mode   = AUTOMATIC;
1240                 netif_carrier_off(dev);
1241                 netif_stop_queue(dev);
1242                 ti->open_action = RESTART;
1243                 outb(0, dev->base_addr + ADAPTRESET);
1244                 ibmtr_reset_timer(&(ti->tr_timer), dev);/*BMS try to reopen*/
1245                 spin_unlock(&(ti->lock));
1246                 return IRQ_HANDLED;
1247         }
1248         if (readb(ti->mmio + ACA_OFFSET + ACA_RW + ISRP_EVEN)
1249                 & (TCR_INT | ERR_INT | ACCESS_INT)) {
1250                 DPRINTK("adapter error: ISRP_EVEN : %02x\n",
1251                         (int)readb(ti->mmio+ ACA_OFFSET + ACA_RW + ISRP_EVEN));
1252                 writeb(~(TCR_INT | ERR_INT | ACCESS_INT),
1253                         ti->mmio + ACA_OFFSET + ACA_RESET + ISRP_EVEN);
1254                 status= readb(ti->mmio+ ACA_OFFSET + ACA_RW + ISRA_EVEN);/*BMS*/
1255                 DPRINTK("ISRA_EVEN == 0x02%x\n",status);/*BMS*/
1256                 writeb(INT_ENABLE, ti->mmio + ACA_OFFSET + ACA_SET + ISRP_EVEN);
1257 #ifdef ENABLE_PAGING
1258                 writeb(save_srpr, ti->mmio + ACA_OFFSET + ACA_RW + SRPR_EVEN);
1259 #endif
1260                 spin_unlock(&(ti->lock));
1261                 return IRQ_HANDLED;
1262         }
1263         if (status & SRB_RESP_INT) {    /* SRB response */
1264                 SET_PAGE(ti->srb_page);
1265 #if TR_VERBOSE
1266                 DPRINTK("SRB resp: cmd=%02X rsp=%02X\n",
1267                                 readb(ti->srb), readb(ti->srb + RETCODE_OFST));
1268 #endif
1269                 switch (readb(ti->srb)) {       /* SRB command check */
1270                 case XMIT_DIR_FRAME:{
1271                         unsigned char xmit_ret_code;
1272                         xmit_ret_code = readb(ti->srb + RETCODE_OFST);
1273                         if (xmit_ret_code == 0xff) break;
1274                         DPRINTK("error on xmit_dir_frame request: %02X\n",
1275                                                                 xmit_ret_code);
1276                         if (ti->current_skb) {
1277                                 dev_kfree_skb_irq(ti->current_skb);
1278                                 ti->current_skb = NULL;
1279                         }
1280                         /*dev->tbusy = 0;*/
1281                         netif_wake_queue(dev);
1282                         if (ti->readlog_pending)
1283                                 ibmtr_readlog(dev);
1284                         break;
1285                 }
1286                 case XMIT_UI_FRAME:{
1287                         unsigned char xmit_ret_code;
1288
1289                         xmit_ret_code = readb(ti->srb + RETCODE_OFST);
1290                         if (xmit_ret_code == 0xff) break;
1291                         DPRINTK("error on xmit_ui_frame request: %02X\n",
1292                                                                 xmit_ret_code);
1293                         if (ti->current_skb) {
1294                                 dev_kfree_skb_irq(ti->current_skb);
1295                                 ti->current_skb = NULL;
1296                         }
1297                         netif_wake_queue(dev);
1298                         if (ti->readlog_pending)
1299                                 ibmtr_readlog(dev);
1300                         break;
1301                 }
1302                 case DIR_OPEN_ADAPTER:
1303                         dir_open_adapter(dev);
1304                         break;
1305                 case DLC_OPEN_SAP:
1306                         if (readb(ti->srb + RETCODE_OFST)) {
1307                                 DPRINTK("open_sap failed: ret_code = %02X, "
1308                                         "retrying\n",
1309                                         (int) readb(ti->srb + RETCODE_OFST));
1310                                 ti->open_action = REOPEN;
1311                                 ibmtr_reset_timer(&(ti->tr_timer), dev);
1312                                 break;
1313                         }
1314                         ti->exsap_station_id = readw(ti->srb + STATION_ID_OFST);
1315                         ti->sap_status = OPEN;/* TR adapter is now available */
1316                         if (ti->open_mode==MANUAL){
1317                                 wake_up(&ti->wait_for_reset);
1318                                 break;
1319                         }
1320                         netif_wake_queue(dev);
1321                         netif_carrier_on(dev);
1322                         break;
1323                 case DIR_INTERRUPT:
1324                 case DIR_MOD_OPEN_PARAMS:
1325                 case DIR_SET_GRP_ADDR:
1326                 case DIR_SET_FUNC_ADDR:
1327                 case DLC_CLOSE_SAP:
1328                         if (readb(ti->srb + RETCODE_OFST))
1329                                 DPRINTK("error on %02X: %02X\n",
1330                                         (int) readb(ti->srb + COMMAND_OFST),
1331                                         (int) readb(ti->srb + RETCODE_OFST));
1332                         break;
1333                 case DIR_READ_LOG:
1334                         if (readb(ti->srb + RETCODE_OFST)){
1335                                 DPRINTK("error on dir_read_log: %02X\n",
1336                                         (int) readb(ti->srb + RETCODE_OFST));
1337                                 netif_wake_queue(dev);
1338                                 break;
1339                         }
1340 #if IBMTR_DEBUG_MESSAGES
1341
1342 #define LINE_ERRORS_OFST                 0
1343 #define INTERNAL_ERRORS_OFST             1
1344 #define BURST_ERRORS_OFST                2
1345 #define AC_ERRORS_OFST                   3
1346 #define ABORT_DELIMITERS_OFST            4
1347 #define LOST_FRAMES_OFST                 6
1348 #define RECV_CONGEST_COUNT_OFST          7
1349 #define FRAME_COPIED_ERRORS_OFST         8
1350 #define FREQUENCY_ERRORS_OFST            9
1351 #define TOKEN_ERRORS_OFST               10
1352
1353                         DPRINTK("Line errors %02X, Internal errors %02X, "
1354                         "Burst errors %02X\n" "A/C errors %02X, "
1355                         "Abort delimiters %02X, Lost frames %02X\n"
1356                         "Receive congestion count %02X, "
1357                         "Frame copied errors %02X\nFrequency errors %02X, "
1358                         "Token errors %02X\n",
1359                         (int) readb(ti->srb + LINE_ERRORS_OFST),
1360                         (int) readb(ti->srb + INTERNAL_ERRORS_OFST),
1361                         (int) readb(ti->srb + BURST_ERRORS_OFST),
1362                         (int) readb(ti->srb + AC_ERRORS_OFST),
1363                         (int) readb(ti->srb + ABORT_DELIMITERS_OFST),
1364                         (int) readb(ti->srb + LOST_FRAMES_OFST),
1365                         (int) readb(ti->srb + RECV_CONGEST_COUNT_OFST),
1366                         (int) readb(ti->srb + FRAME_COPIED_ERRORS_OFST),
1367                         (int) readb(ti->srb + FREQUENCY_ERRORS_OFST),
1368                         (int) readb(ti->srb + TOKEN_ERRORS_OFST));
1369 #endif
1370                         netif_wake_queue(dev);
1371                         break;
1372                 default:
1373                         DPRINTK("Unknown command %02X encountered\n",
1374                                                 (int) readb(ti->srb));
1375                 }       /* end switch SRB command check */
1376                 writeb(~SRB_RESP_INT, ti->mmio+ ACA_OFFSET+ACA_RESET+ ISRP_ODD);
1377         }       /* if SRB response */
1378         if (status & ASB_FREE_INT) {    /* ASB response */
1379                 SET_PAGE(ti->asb_page);
1380 #if TR_VERBOSE
1381                 DPRINTK("ASB resp: cmd=%02X\n", readb(ti->asb));
1382 #endif
1383
1384                 switch (readb(ti->asb)) {       /* ASB command check */
1385                 case REC_DATA:
1386                 case XMIT_UI_FRAME:
1387                 case XMIT_DIR_FRAME:
1388                         break;
1389                 default:
1390                         DPRINTK("unknown command in asb %02X\n",
1391                                                 (int) readb(ti->asb));
1392                 }       /* switch ASB command check */
1393                 if (readb(ti->asb + 2) != 0xff) /* checks ret_code */
1394                         DPRINTK("ASB error %02X in cmd %02X\n",
1395                                 (int) readb(ti->asb + 2), (int) readb(ti->asb));
1396                 writeb(~ASB_FREE_INT, ti->mmio+ ACA_OFFSET+ACA_RESET+ ISRP_ODD);
1397         }       /* if ASB response */
1398
1399 #define STATUS_OFST             6
1400 #define NETW_STATUS_OFST        6
1401
1402         if (status & ARB_CMD_INT) {     /* ARB response */
1403                 SET_PAGE(ti->arb_page);
1404 #if TR_VERBOSE
1405                 DPRINTK("ARB resp: cmd=%02X\n", readb(ti->arb));
1406 #endif
1407
1408                 switch (readb(ti->arb)) {       /* ARB command check */
1409                 case DLC_STATUS:
1410                         DPRINTK("DLC_STATUS new status: %02X on station %02X\n",
1411                                 ntohs(readw(ti->arb + STATUS_OFST)),
1412                                 ntohs(readw(ti->arb+ STATION_ID_OFST)));
1413                         break;
1414                 case REC_DATA:
1415                         tr_rx(dev);
1416                         break;
1417                 case RING_STAT_CHANGE:{
1418                         unsigned short ring_status;
1419                         ring_status= ntohs(readw(ti->arb + NETW_STATUS_OFST));
1420                         if (ibmtr_debug_trace & TRC_INIT)
1421                                 DPRINTK("Ring Status Change...(0x%x)\n",
1422                                                                 ring_status);
1423                         if(ring_status& (REMOVE_RECV|AUTO_REMOVAL|LOBE_FAULT)){
1424                                 netif_stop_queue(dev);
1425                                 netif_carrier_off(dev);
1426                                 DPRINTK("Remove received, or Auto-removal error"
1427                                         ", or Lobe fault\n");
1428                                 DPRINTK("We'll try to reopen the closed adapter"
1429                                         " after a %d second delay.\n",
1430                                                 TR_RETRY_INTERVAL/HZ);
1431                                 /*I was confused: I saw the TR reopening but */
1432                                 /*forgot:with an RJ45 in an RJ45/ICS adapter */
1433                                 /*but adapter not in the ring, the TR will   */
1434                                 /* open, and then soon close and come here.  */
1435                                 ti->open_mode = AUTOMATIC;
1436                                 ti->open_status = CLOSED; /*12/2000 BMS*/
1437                                 ti->open_action = REOPEN;
1438                                 ibmtr_reset_timer(&(ti->tr_timer), dev);
1439                         } else if (ring_status & LOG_OVERFLOW) {
1440                                 if(netif_queue_stopped(dev))
1441                                         ti->readlog_pending = 1;
1442                                 else
1443                                         ibmtr_readlog(dev);
1444                         }
1445                         break;
1446                 }
1447                 case XMIT_DATA_REQ:
1448                         tr_tx(dev);
1449                         break;
1450                 default:
1451                         DPRINTK("Unknown command %02X in arb\n",
1452                                                 (int) readb(ti->arb));
1453                         break;
1454                 }       /* switch ARB command check */
1455                 writeb(~ARB_CMD_INT, ti->mmio+ ACA_OFFSET+ACA_RESET + ISRP_ODD);
1456                 writeb(ARB_FREE, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD);
1457         }       /* if ARB response */
1458         if (status & SSB_RESP_INT) {    /* SSB response */
1459                 unsigned char retcode;
1460                 SET_PAGE(ti->ssb_page);
1461 #if TR_VERBOSE
1462                 DPRINTK("SSB resp: cmd=%02X rsp=%02X\n",
1463                                 readb(ti->ssb), readb(ti->ssb + 2));
1464 #endif
1465
1466                 switch (readb(ti->ssb)) {       /* SSB command check */
1467                 case XMIT_DIR_FRAME:
1468                 case XMIT_UI_FRAME:
1469                         retcode = readb(ti->ssb + 2);
1470                         if (retcode && (retcode != 0x22))/* checks ret_code */
1471                                 DPRINTK("xmit ret_code: %02X xmit error code: "
1472                                         "%02X\n",
1473                                         (int)retcode, (int)readb(ti->ssb + 6));
1474                         else
1475                                 dev->stats.tx_packets++;
1476                         break;
1477                 case XMIT_XID_CMD:
1478                         DPRINTK("xmit xid ret_code: %02X\n",
1479                                                 (int) readb(ti->ssb + 2));
1480                 default:
1481                         DPRINTK("Unknown command %02X in ssb\n",
1482                                                 (int) readb(ti->ssb));
1483                 }       /* SSB command check */
1484                 writeb(~SSB_RESP_INT, ti->mmio+ ACA_OFFSET+ACA_RESET+ ISRP_ODD);
1485                 writeb(SSB_FREE, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD);
1486         }       /* if SSB response */
1487 #ifdef ENABLE_PAGING
1488         writeb(save_srpr, ti->mmio + ACA_OFFSET + ACA_RW + SRPR_EVEN);
1489 #endif
1490         writeb(INT_ENABLE, ti->mmio + ACA_OFFSET + ACA_SET + ISRP_EVEN);
1491         spin_unlock(&(ti->lock));
1492         return IRQ_HANDLED;
1493 }                               /*tok_interrupt */
1494
1495 /*****************************************************************************/
1496
1497 #define INIT_STATUS_OFST        1
1498 #define INIT_STATUS_2_OFST      2
1499 #define ENCODED_ADDRESS_OFST    8
1500
1501 static void initial_tok_int(struct net_device *dev)
1502 {
1503
1504         __u32 encoded_addr, hw_encoded_addr;
1505         struct tok_info *ti;
1506         unsigned char init_status; /*BMS 12/2000*/
1507
1508         ti = netdev_priv(dev);
1509
1510         ti->do_tok_int = NOT_FIRST;
1511
1512         /* we assign the shared-ram address for ISA devices */
1513         writeb(ti->sram_base, ti->mmio + ACA_OFFSET + ACA_RW + RRR_EVEN);
1514 #ifndef PCMCIA
1515         ti->sram_virt = ioremap(((__u32)ti->sram_base << 12), ti->avail_shared_ram);
1516 #endif
1517         ti->init_srb = map_address(ti,
1518                 ntohs(readw(ti->mmio + ACA_OFFSET + WRBR_EVEN)),
1519                 &ti->init_srb_page);
1520         if (ti->page_mask && ti->avail_shared_ram == 127) {
1521                 void __iomem *last_512;
1522                 __u8 last_512_page=0;
1523                 int i;
1524                 last_512 = map_address(ti, 0xfe00, &last_512_page);
1525                 /* initialize high section of ram (if necessary) */
1526                 SET_PAGE(last_512_page);
1527                 for (i = 0; i < 512; i++)
1528                         writeb(0, last_512 + i);
1529         }
1530         SET_PAGE(ti->init_srb_page);
1531
1532 #if TR_VERBOSE
1533         {
1534         int i;
1535
1536         DPRINTK("ti->init_srb_page=0x%x\n", ti->init_srb_page);
1537         DPRINTK("init_srb(%p):", ti->init_srb );
1538         for (i = 0; i < 20; i++)
1539                 printk("%02X ", (int) readb(ti->init_srb + i));
1540         printk("\n");
1541         }
1542 #endif
1543
1544         hw_encoded_addr = readw(ti->init_srb + ENCODED_ADDRESS_OFST);
1545         encoded_addr = ntohs(hw_encoded_addr);
1546         init_status= /*BMS 12/2000 check for shallow mode possibility (Turbo)*/
1547         readb(ti->init_srb+offsetof(struct srb_init_response,init_status));
1548         /*printk("Initial interrupt: init_status= 0x%02x\n",init_status);*/
1549         ti->ring_speed = init_status & 0x01 ? 16 : 4;
1550         DPRINTK("Initial interrupt : %d Mbps, shared RAM base %08x.\n",
1551                                 ti->ring_speed, (unsigned int)dev->mem_start);
1552         ti->auto_speedsave = (readb(ti->init_srb+INIT_STATUS_2_OFST) & 4) != 0;
1553
1554         if (ti->open_mode == MANUAL)    wake_up(&ti->wait_for_reset);
1555         else                            tok_open_adapter((unsigned long)dev);
1556         
1557 } /*initial_tok_int() */
1558
1559 /*****************************************************************************/
1560
1561 #define CMD_CORRELATE_OFST      1
1562 #define DHB_ADDRESS_OFST        6
1563
1564 #define FRAME_LENGTH_OFST       6
1565 #define HEADER_LENGTH_OFST      8
1566 #define RSAP_VALUE_OFST         9
1567
1568 static void tr_tx(struct net_device *dev)
1569 {
1570         struct tok_info *ti = netdev_priv(dev);
1571         struct trh_hdr *trhdr = (struct trh_hdr *) ti->current_skb->data;
1572         unsigned int hdr_len;
1573         __u32 dhb=0,dhb_base;
1574         void __iomem *dhbuf = NULL;
1575         unsigned char xmit_command;
1576         int i,dhb_len=0x4000,src_len,src_offset;
1577         struct trllc *llc;
1578         struct srb_xmit xsrb;
1579         __u8 dhb_page = 0;
1580         __u8 llc_ssap;
1581
1582         SET_PAGE(ti->asb_page);
1583
1584         if (readb(ti->asb+RETCODE_OFST) != 0xFF) DPRINTK("ASB not free !!!\n");
1585
1586         /* in providing the transmit interrupts, is telling us it is ready for
1587            data and providing a shared memory address for us to stuff with data.
1588            Here we compute the effective address where we will place data.
1589         */
1590         SET_PAGE(ti->arb_page);
1591         dhb=dhb_base=ntohs(readw(ti->arb + DHB_ADDRESS_OFST));
1592         if (ti->page_mask) {
1593                 dhb_page = (dhb_base >> 8) & ti->page_mask;
1594                 dhb=dhb_base & ~(ti->page_mask << 8);
1595         }
1596         dhbuf = ti->sram_virt + dhb;
1597
1598         /* Figure out the size of the 802.5 header */
1599         if (!(trhdr->saddr[0] & 0x80))  /* RIF present? */
1600                 hdr_len = sizeof(struct trh_hdr) - TR_MAXRIFLEN;
1601         else
1602                 hdr_len = ((ntohs(trhdr->rcf) & TR_RCF_LEN_MASK) >> 8)
1603                     + sizeof(struct trh_hdr) - TR_MAXRIFLEN;
1604
1605         llc = (struct trllc *) (ti->current_skb->data + hdr_len);
1606
1607         llc_ssap = llc->ssap;
1608         SET_PAGE(ti->srb_page);
1609         memcpy_fromio(&xsrb, ti->srb, sizeof(xsrb));
1610         SET_PAGE(ti->asb_page);
1611         xmit_command = xsrb.command;
1612
1613         writeb(xmit_command, ti->asb + COMMAND_OFST);
1614         writew(xsrb.station_id, ti->asb + STATION_ID_OFST);
1615         writeb(llc_ssap, ti->asb + RSAP_VALUE_OFST);
1616         writeb(xsrb.cmd_corr, ti->asb + CMD_CORRELATE_OFST);
1617         writeb(0, ti->asb + RETCODE_OFST);
1618         if ((xmit_command == XMIT_XID_CMD) || (xmit_command == XMIT_TEST_CMD)) {
1619                 writew(htons(0x11), ti->asb + FRAME_LENGTH_OFST);
1620                 writeb(0x0e, ti->asb + HEADER_LENGTH_OFST);
1621                 SET_PAGE(dhb_page);
1622                 writeb(AC, dhbuf);
1623                 writeb(LLC_FRAME, dhbuf + 1);
1624                 for (i = 0; i < TR_ALEN; i++)
1625                         writeb((int) 0x0FF, dhbuf + i + 2);
1626                 for (i = 0; i < TR_ALEN; i++)
1627                         writeb(0, dhbuf + i + TR_ALEN + 2);
1628                 writeb(RESP_IN_ASB, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD);
1629                 return;
1630         }
1631         /*
1632          *    the token ring packet is copied from sk_buff to the adapter
1633          *    buffer identified in the command data received with the interrupt.
1634          */
1635         writeb(hdr_len, ti->asb + HEADER_LENGTH_OFST);
1636         writew(htons(ti->current_skb->len), ti->asb + FRAME_LENGTH_OFST);
1637         src_len=ti->current_skb->len;
1638         src_offset=0;
1639         dhb=dhb_base;
1640         while(1) {
1641                 if (ti->page_mask) {
1642                         dhb_page=(dhb >> 8) & ti->page_mask;
1643                         dhb=dhb & ~(ti->page_mask << 8);
1644                         dhb_len=0x4000-dhb; /* remaining size of this page */
1645                 }
1646                 dhbuf = ti->sram_virt + dhb;
1647                 SET_PAGE(dhb_page);
1648                 if (src_len > dhb_len) {
1649                         memcpy_toio(dhbuf,&ti->current_skb->data[src_offset],
1650                                         dhb_len);
1651                         src_len -= dhb_len;
1652                         src_offset += dhb_len;
1653                         dhb_base+=dhb_len;
1654                         dhb=dhb_base;
1655                         continue;
1656                 }
1657                 memcpy_toio(dhbuf, &ti->current_skb->data[src_offset], src_len);
1658                 break;
1659         }
1660         writeb(RESP_IN_ASB, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD);
1661         dev->stats.tx_bytes += ti->current_skb->len;
1662         dev_kfree_skb_irq(ti->current_skb);
1663         ti->current_skb = NULL;
1664         netif_wake_queue(dev);
1665         if (ti->readlog_pending)
1666                 ibmtr_readlog(dev);
1667 }                               /*tr_tx */
1668
1669 /*****************************************************************************/
1670
1671
1672 #define RECEIVE_BUFFER_OFST     6
1673 #define LAN_HDR_LENGTH_OFST     8
1674 #define DLC_HDR_LENGTH_OFST     9
1675
1676 #define DSAP_OFST               0
1677 #define SSAP_OFST               1
1678 #define LLC_OFST                2
1679 #define PROTID_OFST             3
1680 #define ETHERTYPE_OFST          6
1681
1682 static void tr_rx(struct net_device *dev)
1683 {
1684         struct tok_info *ti = netdev_priv(dev);
1685         __u32 rbuffer;
1686         void __iomem *rbuf, *rbufdata, *llc;
1687         __u8 rbuffer_page = 0;
1688         unsigned char *data;
1689         unsigned int rbuffer_len, lan_hdr_len, hdr_len, ip_len, length;
1690         unsigned char dlc_hdr_len;
1691         struct sk_buff *skb;
1692         unsigned int skb_size = 0;
1693         int IPv4_p = 0;
1694         unsigned int chksum = 0;
1695         struct iphdr *iph;
1696         struct arb_rec_req rarb;
1697
1698         SET_PAGE(ti->arb_page);
1699         memcpy_fromio(&rarb, ti->arb, sizeof(rarb));
1700         rbuffer = ntohs(rarb.rec_buf_addr) ;
1701         rbuf = map_address(ti, rbuffer, &rbuffer_page);
1702
1703         SET_PAGE(ti->asb_page);
1704
1705         if (readb(ti->asb + RETCODE_OFST) !=0xFF) DPRINTK("ASB not free !!!\n");
1706
1707         writeb(REC_DATA, ti->asb + COMMAND_OFST);
1708         writew(rarb.station_id, ti->asb + STATION_ID_OFST);
1709         writew(rarb.rec_buf_addr, ti->asb + RECEIVE_BUFFER_OFST);
1710
1711         lan_hdr_len = rarb.lan_hdr_len;
1712         if (lan_hdr_len > sizeof(struct trh_hdr)) {
1713                 DPRINTK("Linux cannot handle greater than 18 bytes RIF\n");
1714                 return;
1715         }                       /*BMS I added this above just to be very safe */
1716         dlc_hdr_len = readb(ti->arb + DLC_HDR_LENGTH_OFST);
1717         hdr_len = lan_hdr_len + sizeof(struct trllc) + sizeof(struct iphdr);
1718
1719         SET_PAGE(rbuffer_page);
1720         llc = rbuf + offsetof(struct rec_buf, data) + lan_hdr_len;
1721
1722 #if TR_VERBOSE
1723         DPRINTK("offsetof data: %02X lan_hdr_len: %02X\n",
1724         (__u32) offsetof(struct rec_buf, data), (unsigned int) lan_hdr_len);
1725         DPRINTK("llc: %08X rec_buf_addr: %04X dev->mem_start: %lX\n",
1726                 llc, ntohs(rarb.rec_buf_addr), dev->mem_start);
1727         DPRINTK("dsap: %02X, ssap: %02X, llc: %02X, protid: %02X%02X%02X, "
1728                 "ethertype: %04X\n",
1729                 (int) readb(llc + DSAP_OFST), (int) readb(llc + SSAP_OFST),
1730                 (int) readb(llc + LLC_OFST), (int) readb(llc + PROTID_OFST),
1731                 (int) readb(llc+PROTID_OFST+1),(int)readb(llc+PROTID_OFST + 2),
1732                 (int) ntohs(readw(llc + ETHERTYPE_OFST)));
1733 #endif
1734         if (readb(llc + offsetof(struct trllc, llc)) != UI_CMD) {
1735                 SET_PAGE(ti->asb_page);
1736                 writeb(DATA_LOST, ti->asb + RETCODE_OFST);
1737                 dev->stats.rx_dropped++;
1738                 writeb(RESP_IN_ASB, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD);
1739                 return;
1740         }
1741         length = ntohs(rarb.frame_len);
1742         if (readb(llc + DSAP_OFST) == EXTENDED_SAP &&
1743            readb(llc + SSAP_OFST) == EXTENDED_SAP &&
1744                 length >= hdr_len)      IPv4_p = 1;
1745 #if TR_VERBOSE
1746 #define SADDR_OFST      8
1747 #define DADDR_OFST      2
1748
1749         if (!IPv4_p) {
1750
1751                 void __iomem *trhhdr = rbuf + offsetof(struct rec_buf, data);
1752                 u8 saddr[6];
1753                 u8 daddr[6];
1754                 int i;
1755                 for (i = 0 ; i < 6 ; i++)
1756                         saddr[i] = readb(trhhdr + SADDR_OFST + i);
1757                 for (i = 0 ; i < 6 ; i++)
1758                         daddr[i] = readb(trhhdr + DADDR_OFST + i);
1759                 DPRINTK("Probably non-IP frame received.\n");
1760                 DPRINTK("ssap: %02X dsap: %02X "
1761                         "saddr: %pM daddr: %pM\n",
1762                         readb(llc + SSAP_OFST), readb(llc + DSAP_OFST),
1763                         saddr, daddr);
1764         }
1765 #endif
1766
1767         /*BMS handle the case she comes in with few hops but leaves with many */
1768         skb_size=length-lan_hdr_len+sizeof(struct trh_hdr)+sizeof(struct trllc);
1769
1770         if (!(skb = dev_alloc_skb(skb_size))) {
1771                 DPRINTK("out of memory. frame dropped.\n");
1772                 dev->stats.rx_dropped++;
1773                 SET_PAGE(ti->asb_page);
1774                 writeb(DATA_LOST, ti->asb + offsetof(struct asb_rec, ret_code));
1775                 writeb(RESP_IN_ASB, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD);
1776                 return;
1777         }
1778         /*BMS again, if she comes in with few but leaves with many */
1779         skb_reserve(skb, sizeof(struct trh_hdr) - lan_hdr_len);
1780         skb_put(skb, length);
1781         data = skb->data;
1782         rbuffer_len = ntohs(readw(rbuf + offsetof(struct rec_buf, buf_len)));
1783         rbufdata = rbuf + offsetof(struct rec_buf, data);
1784
1785         if (IPv4_p) {
1786                 /* Copy the headers without checksumming */
1787                 memcpy_fromio(data, rbufdata, hdr_len);
1788
1789                 /* Watch for padded packets and bogons */
1790                 iph= (struct iphdr *)(data+ lan_hdr_len + sizeof(struct trllc));
1791                 ip_len = ntohs(iph->tot_len) - sizeof(struct iphdr);
1792                 length -= hdr_len;
1793                 if ((ip_len <= length) && (ip_len > 7))
1794                         length = ip_len;
1795                 data += hdr_len;
1796                 rbuffer_len -= hdr_len;
1797                 rbufdata += hdr_len;
1798         }
1799         /* Copy the payload... */
1800 #define BUFFER_POINTER_OFST     2
1801 #define BUFFER_LENGTH_OFST      6
1802         for (;;) {
1803                 if (ibmtr_debug_trace&TRC_INITV && length < rbuffer_len)
1804                         DPRINTK("CURIOUS, length=%d < rbuffer_len=%d\n",
1805                                                 length,rbuffer_len);
1806                 if (IPv4_p)
1807                         chksum=csum_partial_copy_nocheck((void*)rbufdata,
1808                             data,length<rbuffer_len?length:rbuffer_len,chksum);
1809                 else
1810                         memcpy_fromio(data, rbufdata, rbuffer_len);
1811                 rbuffer = ntohs(readw(rbuf+BUFFER_POINTER_OFST)) ;
1812                 if (!rbuffer)
1813                         break;
1814                 rbuffer -= 2;
1815                 length -= rbuffer_len;
1816                 data += rbuffer_len;
1817                 rbuf = map_address(ti, rbuffer, &rbuffer_page);
1818                 SET_PAGE(rbuffer_page);
1819                 rbuffer_len = ntohs(readw(rbuf + BUFFER_LENGTH_OFST));
1820                 rbufdata = rbuf + offsetof(struct rec_buf, data);
1821         }
1822
1823         SET_PAGE(ti->asb_page);
1824         writeb(0, ti->asb + offsetof(struct asb_rec, ret_code));
1825
1826         writeb(RESP_IN_ASB, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD);
1827
1828         dev->stats.rx_bytes += skb->len;
1829         dev->stats.rx_packets++;
1830
1831         skb->protocol = tr_type_trans(skb, dev);
1832         if (IPv4_p) {
1833                 skb->csum = chksum;
1834                 skb->ip_summed = CHECKSUM_COMPLETE;
1835         }
1836         netif_rx(skb);
1837 }                               /*tr_rx */
1838
1839 /*****************************************************************************/
1840
1841 static void ibmtr_reset_timer(struct timer_list *tmr, struct net_device *dev)
1842 {
1843         tmr->expires = jiffies + TR_RETRY_INTERVAL;
1844         tmr->data = (unsigned long) dev;
1845         tmr->function = tok_rerun;
1846         init_timer(tmr);
1847         add_timer(tmr);
1848 }
1849
1850 /*****************************************************************************/
1851
1852 static void tok_rerun(unsigned long dev_addr)
1853 {
1854         struct net_device *dev = (struct net_device *)dev_addr;
1855         struct tok_info *ti = netdev_priv(dev);
1856
1857         if ( ti->open_action == RESTART){
1858                 ti->do_tok_int = FIRST_INT;
1859                 outb(0, dev->base_addr + ADAPTRESETREL);
1860 #ifdef ENABLE_PAGING
1861                 if (ti->page_mask)
1862                         writeb(SRPR_ENABLE_PAGING,
1863                                 ti->mmio + ACA_OFFSET + ACA_RW + SRPR_EVEN);
1864 #endif
1865
1866                 writeb(INT_ENABLE, ti->mmio + ACA_OFFSET + ACA_SET + ISRP_EVEN);
1867         } else
1868                 tok_open_adapter(dev_addr);
1869 }
1870
1871 /*****************************************************************************/
1872
1873 static void ibmtr_readlog(struct net_device *dev)
1874 {
1875         struct tok_info *ti;
1876
1877         ti = netdev_priv(dev);
1878
1879         ti->readlog_pending = 0;
1880         SET_PAGE(ti->srb_page);
1881         writeb(DIR_READ_LOG, ti->srb);
1882         writeb(INT_ENABLE, ti->mmio + ACA_OFFSET + ACA_SET + ISRP_EVEN);
1883         writeb(CMD_IN_SRB, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD);
1884
1885         netif_stop_queue(dev);
1886
1887 }
1888
1889 /*****************************************************************************/
1890
1891 static int ibmtr_change_mtu(struct net_device *dev, int mtu)
1892 {
1893         struct tok_info *ti = netdev_priv(dev);
1894
1895         if (ti->ring_speed == 16 && mtu > ti->maxmtu16)
1896                 return -EINVAL;
1897         if (ti->ring_speed == 4 && mtu > ti->maxmtu4)
1898                 return -EINVAL;
1899         dev->mtu = mtu;
1900         return 0;
1901 }
1902
1903 /*****************************************************************************/
1904 #ifdef MODULE
1905
1906 /* 3COM 3C619C supports 8 interrupts, 32 I/O ports */
1907 static struct net_device *dev_ibmtr[IBMTR_MAX_ADAPTERS];
1908 static int io[IBMTR_MAX_ADAPTERS] = { 0xa20, 0xa24 };
1909 static int irq[IBMTR_MAX_ADAPTERS];
1910 static int mem[IBMTR_MAX_ADAPTERS];
1911
1912 MODULE_LICENSE("GPL");
1913
1914 module_param_array(io, int, NULL, 0);
1915 module_param_array(irq, int, NULL, 0);
1916 module_param_array(mem, int, NULL, 0);
1917
1918 static int __init ibmtr_init(void)
1919 {
1920         int i;
1921         int count=0;
1922
1923         find_turbo_adapters(io);
1924
1925         for (i = 0; i < IBMTR_MAX_ADAPTERS && io[i]; i++) {
1926                 struct net_device *dev;
1927                 irq[i] = 0;
1928                 mem[i] = 0;
1929                 dev = alloc_trdev(sizeof(struct tok_info));
1930                 if (dev == NULL) { 
1931                         if (i == 0)
1932                                 return -ENOMEM;
1933                         break;
1934                 }
1935                 dev->base_addr = io[i];
1936                 dev->irq = irq[i];
1937                 dev->mem_start = mem[i];
1938
1939                 if (ibmtr_probe_card(dev)) {
1940                         free_netdev(dev);
1941                         continue;
1942                 }
1943                 dev_ibmtr[i] = dev;
1944                 count++;
1945         }
1946         if (count) return 0;
1947         printk("ibmtr: register_netdev() returned non-zero.\n");
1948         return -EIO;
1949 }
1950 module_init(ibmtr_init);
1951
1952 static void __exit ibmtr_cleanup(void)
1953 {
1954         int i;
1955
1956         for (i = 0; i < IBMTR_MAX_ADAPTERS; i++){
1957                 if (!dev_ibmtr[i])
1958                         continue;
1959                 unregister_netdev(dev_ibmtr[i]);
1960                 ibmtr_cleanup_card(dev_ibmtr[i]);
1961                 free_netdev(dev_ibmtr[i]);
1962         }
1963 }
1964 module_exit(ibmtr_cleanup);
1965 #endif